I can search you can search he can search we can search you can search they can search
V-ing form
I can be searching you can be searching he can be searching we can be searching you can be searching they can be searching
Perfect
I can have searched you can have searched he can have searched we can have searched you can have searched they can have searched
V-ing perfect
I can have been searching you can have been searching he can have been searching we can have been searching you can have been searching they can have been searching
Negation
Simple form
I can't search you can't search he can't search we can't search you can't search they can't search
V-ing form
I can't be searching you can't be searching he can't be searching we can't be searching you can't be searching they can't be searching
Perfect
I can't have searched you can't have searched he can't have searched we can't have searched you can't have searched they can't have searched
V-ing perfect
I can't have been searching you can't have been searching he can't have been searching we can't have been searching you can't have been searching they can't have been searching
Interrogative form
Simple form
can I search? can you search? can he search? can we search? can you search? can they search?
V-ing form
can I be searching? can you be searching? can he be searching? can we be searching? can you be searching? can they be searching?
Perfect
can I have searched? can you have searched? can he have searched? can we have searched? can you have searched? can they have searched?
V-ing perfect
can I have been searching? can you have been searching? can he have been searching? can we have been searching? can you have been searching? can they have been searching?
Interro-negative form
Simple form
can't I search? can't you search? can't he search? can't we search? can't you search? can't they search?
V-ing form
can't I be searching? can't you be searching? can't he be searching? can't we be searching? can't you be searching? can't they be searching?
Perfect
can't I have searched? can't you have searched? can't he have searched? can't we have searched? can't you have searched? can't they have searched?
V-ing perfect
can't I have been searching? can't you have been searching? can't he have been searching? can't we have been searching? can't you have been searching? can't they have been searching?